The Density of Douglas Firs in an Old-Growth Forest Is

question 51

Multiple Choice

The density of Douglas firs in an old-growth forest is estimated by counting the Douglas firs in four sample plots of 1 hectare each. The number of fir trees in the plots is 10, 12, 7, and 11, respectively. What is the estimated density of firs in the forest?

• A) 5 trees per hectare
• B) 10 trees per hectare
• C) 20 trees per hectare
• D) 25 trees per hectare

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